300 DPI is what print shops, KDP and most printable marketplaces ask for. Drop your images in, check the print size, and download them labelled 300 DPI without recompressing.
Drop images here or choose files
JPG, PNG, WebP, GIF, BMP · up to 200 at once · files never leave your device
Each image gets the DPI that makes it print exactly this wide.
At normal reading distance the human eye can't separate dots finer than about 300 per inch, so 300 DPI is the point where a print looks perfectly smooth. Labs use it as a quick check: a file labelled 72 DPI usually came straight from a screen or a phone, and gets flagged even if it has plenty of pixels.
Divide the pixel width and height by 300. A 3600 × 2400 pixel photo prints at 12 × 8 inches (30.5 × 20.3 cm). The tool shows this for every file before you download. Common sizes:
| Print size | Pixels at 300 DPI |
|---|---|
| Wallet | 750 × 1050 |
| 4×6 in | 1200 × 1800 |
| 5×7 in | 1500 × 2100 |
| 8×10 in | 2400 × 3000 |
| 8.5×11 in (Letter) | 2550 × 3300 |
| A4 (21×29.7 cm) | 2480 × 3508 |
| 11×14 in | 3300 × 4200 |
| A3 (29.7×42 cm) | 3508 × 4961 |
| 16×20 in | 4800 × 6000 |
| 18×24 in | 5400 × 7200 |
| A2 (42×59.4 cm) | 4961 × 7016 |
| 24×36 in | 7200 × 10800 |
Changing the label to 300 DPI keeps every pixel, so a large image stays large and sharp. If your image doesn't have enough pixels for the print size you want, you need a higher-resolution original or an AI upscaler; no DPI tool can add real detail.
Yes, completely free with no sign-up, watermark or file limit beyond 200 images per batch.
No. On screen it looks identical. Only the print size changes, because the same pixels are now packed 300 to the inch.
Use our DPI checker, or on Windows right-click the file, then Properties, then Details. On Mac open it in Preview and choose Tools, then Show Inspector.
Yes. Click 600 in the presets or type any value from 1 to 65535.